Nail or screw for securing corrugated iron.



PATENTED MAY 22, 1906.

J. B. DAVIES. NAIL 0R SCREW FOR SECURING CORRUGATED IRON.

APPLICATION FILED JAN. 27. 1903.

w TNaaazs UNITED. STATES PATENT OFFICE. JOSEPH BAR LETT D VIES, or MALVERN, VICTORIA, AUSTRALIA. NAIL OR SCREW FVOR SECURlNG CORRUGATED IRON- Specification of Letters Patent. Application filed January 27. 1903. Serial No. 140.710.

Patented ma 22,1906.

To all whom it may concern:

Be it known that I, JosEPH BARTLETT DAVIES, accountant, of Elouera, Wheatland Road, Malvern, in the State of Victoria, Commonwealth of Australia, have invented certain new and useful Improved Nails or Screws for Securing Corrugated Iron; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention relates to an improved nail or screw for securing corrugated iron for roofing, fencing, and other urposes. It consists ofa solidead nail of the wirenail type or a. screw provided with a softmetal bearing surface, sheathing, or ring un der the nail or screw head, said soft-metal part being secured, as'hereinafter explained, without the aid of washers and without having to reduce the diameter of the shank under the head, such as by slicing the metal of the shank upward to form a sort of bur or annular rivet. The soft-metal art of nailhead is designed to provide a p iable seating cushion or rim which will conform to the shape of the corrugated sheet and make a tight joint when driven against it without indenting the corrugated sheet. The crown or upper part of said solid head is in no case covered with soft metal, and hence hammerblows given the nail when being driven are made upon the hard solid metal of the nail. The nai or screw prior to the soft-metal part being affixed may be ungalvanized or galvanized or be otherwise coated to prevent rust. Said soft-metal art of the head may be of such as lead, and it may either besecured in position upon a blank nail by pressure'between dies or be cast about the solid head or be secured by a combined casting and pressure process.

The invention will now be described, aided by a reference to the accom anying sheet of drawings, in which the na is shown to a scale about twice its usual size in order to clearly illustrate the invention, and in which drawings- Figure 1 shows a blank nail suitable for my invention provided with webs or ribs on the shank under the solid head and formed as a continuation therefrom; Fig. 2, acentral section in part of the nail shown in Fig. 1 after the soft-metal art has been secured under .or about the nail-head; 3, an under side plan of the nail-head shown in Fig. 2; Fig. 4, a side view of the nail shown in Fig. 2 with the soft-metal part removed in order to exhead is preferably flat, exce cumference and hibit the formation of the burs which are formed by forcing the lower part of the ribs upward to assist in holding said soft-metal part in position; Fig. 5, a central section showing the soft-metal part upon or about a screw-head. Figs. 6, 7, and 8 show modifications, partly in section, in the shape of both the solid head and the soft-metal part of the 'nail; Fig. 9, a central section showing the soft-metal art secured under the head by burs formed on the shank; Fig. 10 is an under side plan of Fig. 9, and Fig. 11 shows the soft-metal part or bearing-piece held in position by being pressed or cast into shallow indentations formed in the shank.

A is the nail-shank, having a solid head A, which may be of any suitable shape and diameter, and A represents small webs or ribs made solid with the nail shank and head, and which parts form the nail-blank. B is the attached soft-metal bearing piece, sheathing, or ring, which may wholly or only partly cover the under surface of head, but in every case covering the under marginal surface to form the pliable seating cushion 0r rim. The upper portionof the nail-head has a striking center a formed either by the gradual elevation toward the crown part or by a central protuberance. The under portion of the solid t in regard to the websor projections A w -ich are formed on the nail-blank, and when securing the soft-metal part are forced and curled upward and outward by dies, so as to form burs or projections a, which clench and secure the lnner marginal edge of the soft-metal part or bearing-surface B in position without in any way impairing the strength of nail by reducing the size of its shank.

The soft-metal part or bearing-surface B may extend from the shank of the nail to beyond the circumference of the solid headand be curled up or passed over its eripherlcal edge or margin, as shown at b in igs. ,2, 5, 6, and 7, or it may be in the form of anannulus or ring B- under curled over its edge, as shown at b in Fig. 8, or the said soft-.metal part may simply cover'the under surface of ead and be secured by burs aF upon or m the head at or near its cir-.

ndentatlons a 1n the shank, as shown in Figs. 9, 10, and 11.

' The lower surface of the soft-metal part or bearing-surface may be flat, as shown 1n 2, 5, 8, 9, and 11, or it may be concaved, as shown in Fig. 6, or it may have a downsheathing, or ring B may be secure wardly-projecting ring I) at or near its outer edge, as shown in Fig. 7, and which ring will allow it to more readily yield to the shape of the iron when driven. The soft-metal under surface of the head'is attached to the solid nail either by pressure between suitable dies or by being cast thereon and. be so attached by being made to overlap the ed e of the solid head in parts or all round and of 1projections or small indentations on the na' shank. Ina similar manner to that already described the sOft-metal bearing part,

screw-nail, as shown in Fig. 5, wherein the head is rovided with a driverslota It wi' be noted that in every case the crown or top of the hard-metal solid head is left bare,-so that when the nails are bein :hammered home the solid; metal of the hea directly above the shank receivesfthe blow, and, further, it will be'noted that in'no case are washers used to secure the soft-metal part on the nail or screw and also that the strength of the soft-metal part is not relied on to hold the corrugated iron in position by being cup-sha ed or of great thickness, but that it is so ormed as simply to act as a cushion between the solid'iron head of the nail and the corrugatediron, said soft-metal part being reinforced all over by said solid y means to a head, except in re ard to such part as is necessary to overlap or the purpose of securing it in position.

' Having now described my invention, what I claim as new, and desire to secure by Let- .ters Patent, is-

1. In combination with a nail having an exposed hard solid head, a soft-metal bearing part extendingfunder the head and up over i the edge of the same, substantially as described.

2. In combination, a nail having an ex posed hard solid head and spurs formed,- about the shank and a soft-metal bearing JOSEPH BARTLETT DAVIES.

Witnesses:

BEDL INGTON BODYCOMB, J. S. THOMPSON. 

